What is a thin film evaporator?
Thin-film or thin-layer evaporators have been developed to purify temperatures sensitive products by evaporation. The solution is a thin film of the liquid product on the inner side of a vertical evaporation pipe which is generated by a rotating wiper system.
What is a falling film evaporator used for?
A falling film evaporator (FFE) is a specific type of vertically oriented shell and tube (S) heat exchanger that is used to separate two or more substances with different boiling point temperatures.
What is the different between falling film evaporator and rising film evaporator?
Falling film evaporators are more commonly used than rising film types. They are less sensitive to solids loading than rising film units, but more sensitive to liquid distribution across the tubes. In a falling film evaporator, poor liquid distribution can cause inefficient heat transfer and tube plugging problems.
What is the other name of rising film evaporator?
Semi Kestner. Semi Kestner, also known as Semi-Rising Film Evaporator, is widely used in sugar industries.
What is agitated thin film dryer?
Agitated Thin Film Dryer is a heat transfer equipment CES is well-versed in manufacturing and supplying. In Agitated Thin Film Dryer, a thin layer of high TDS solution or Mother Liquor of waste water is distributed on the Heating Surface of the ATFD Inner shell.
What are the different types of evaporators?
Types of evaporators used today
- Natural/forced circulation evaporator.
- Falling film evaporator.
- Rising film (Long Tube Vertical) evaporator.
- Climbing and falling-film plate evaporator.
- Multiple-effect evaporators.
- Agitated thin film evaporators.
- Problems.
- Marine use.
What is the capacity of an evaporator?
• Capacity of evaporator is defined as the number of kilograms of water vaporized/evaporator per hour. The rate of heat transfer Q the heating surface of evaporator is the product of heat transfer heat transfer surface area and the overall temperature drop.
What is the disadvantage of rising film over falling film?
Higher pressure drop through the tubes than in a falling-film evaporator. Hydrostatic head at the bottom of the tubes may increase product temperature and cause temperature-sensitivity problems.
How is steam economy calculated?
Capacity is defined as the number of kilogram of water vaporized per hour. Economy (or steam economy) is the number kilogram of water vaporized from all the effects per kilogram of steam used. For single effect evaporator, the steam economy is about 0.8 (<1).
What is Mee and ATFD?
SALT DRYER & ATFD UNIT It Is used to evaporate the residue water from MEE concentrated liquid and generate dry salt for dispose. MEE concentrated liquid have large amount of water content which is not possible to dispose so salt dryer is used after MEE to reduce water content from MEE concentrated liquid.
Which is a type of wiped film evaporator?
Wiped film evaporation (WFE) is a form of thin film evaporator that creates a “thin film” of liquid along the evaporative surface using rotor driven spinning wiper blades and is typically used with highly viscous mixtures. There are other forms of thin film evaporators other than a WFE designed to separate compounds.
How does the thin film evaporator process work?
Thin Film Evaporation combines the following to handle heat-sensitive, viscous, and fouling processes: 1 Extremely Short Residence Time 2 Effective Heat Transfer 3 High Turbulence 4 Rapid Surface Renewal More
Which is temperature sensitive product in a thin film evaporator?
Thin-film or thin-layer evaporators have been developed to purify temperatures sensitive products by evaporation. The temperature sensitive product can be both the high and the low boiling component in the mixture.
How is a wiper used in an evaporator?
Used for heat sensitive or highly viscous fluids, engineered wipers create a thin film on the evaporator surface that enables thin film evaporation and short path condensation. Most traditional wiped film evaporators require each distillation pass to be performed in a single, separate cycle.